Gab Social. All are welcome.

app/controllers/auth/sessions_controller.rb

@@ -0,0 +1,130 @@
+# frozen_string_literal: true
+
+class Auth::SessionsController < Devise::SessionsController
+  include Devise::Controllers::Rememberable
+
+  layout 'auth'
+
+  skip_before_action :require_no_authentication, only: [:create]
+  skip_before_action :check_user_permissions, only: [:destroy]
+  prepend_before_action :authenticate_with_two_factor, if: :two_factor_enabled?, only: [:create]
+  before_action :set_instance_presenter, only: [:new]
+  before_action :set_body_classes
+
+  def new
+    Devise.omniauth_configs.each do |provider, config|
+      return redirect_to(omniauth_authorize_path(resource_name, provider)) if config.strategy.redirect_at_sign_in
+    end
+
+    super
+  end
+
+  def create
+    super do |resource|
+      remember_me(resource)
+      flash.delete(:notice)
+    end
+  end
+
+  def destroy
+    tmp_stored_location = stored_location_for(:user)
+    super
+    flash.delete(:notice)
+    store_location_for(:user, tmp_stored_location) if continue_after?
+  end
+
+  protected
+
+  def find_user
+    if session[:otp_user_id]
+      User.find(session[:otp_user_id])
+    elsif user_params[:email]
+      if use_seamless_external_login? && Devise.check_at_sign && user_params[:email].index('@').nil?
+        User.joins(:account).find_by(accounts: { username: user_params[:email] })
+      else
+        User.find_for_authentication(email: user_params[:email])
+      end
+    end
+  end
+
+  def user_params
+    params.require(:user).permit(:email, :password, :otp_attempt)
+  end
+
+  def after_sign_in_path_for(resource)
+    last_url = stored_location_for(:user)
+
+    if home_paths(resource).include?(last_url)
+      root_path
+    else
+      last_url || root_path
+    end
+  end
+
+  def after_sign_out_path_for(_resource_or_scope)
+    Devise.omniauth_configs.each_value do |config|
+      return root_path if config.strategy.redirect_at_sign_in
+    end
+
+    super
+  end
+
+  def two_factor_enabled?
+    find_user.try(:otp_required_for_login?)
+  end
+
+  def valid_otp_attempt?(user)
+    user.validate_and_consume_otp!(user_params[:otp_attempt]) ||
+      user.invalidate_otp_backup_code!(user_params[:otp_attempt])
+  rescue OpenSSL::Cipher::CipherError => _error
+    false
+  end
+
+  def authenticate_with_two_factor
+    user = self.resource = find_user
+
+    if user_params[:otp_attempt].present? && session[:otp_user_id]
+      authenticate_with_two_factor_via_otp(user)
+    elsif user&.valid_password?(user_params[:password])
+      prompt_for_two_factor(user)
+    end
+  end
+
+  def authenticate_with_two_factor_via_otp(user)
+    if valid_otp_attempt?(user)
+      session.delete(:otp_user_id)
+      remember_me(user)
+      sign_in(user)
+    else
+      flash.now[:alert] = I18n.t('users.invalid_otp_token')
+      prompt_for_two_factor(user)
+    end
+  end
+
+  def prompt_for_two_factor(user)
+    session[:otp_user_id] = user.id
+    render :two_factor
+  end
+
+  private
+
+  def set_instance_presenter
+    @instance_presenter = InstancePresenter.new
+  end
+
+  def set_body_classes
+    @body_classes = 'lighter'
+  end
+
+  def home_paths(resource)
+    paths = [homepage_path]
+    if single_user_mode? && resource.is_a?(User)
+      paths << short_account_path(username: resource.account)
+    end
+    paths
+  end
+
+  def continue_after?
+    truthy_param?(:continue)
+  end
+end